EP 1005562 B1 20040225 - SUCCINIC ACID PRODUCTION AND PURIFICATION
Title (en)
SUCCINIC ACID PRODUCTION AND PURIFICATION
Title (de)
BERNSTEINSÄURE HERSTELLUNG UND REINIGUNG
Title (fr)
PRODUCTION ET PURIFICATION D'ACIDE SUCCINIQUE
Publication
Application
Priority
- US 9817123 W 19980818
- US 5601397 P 19970818
- US 13406198 A 19980813
Abstract (en)
[origin: WO9909196A1] A highly efficient process for the production and recovery of pure succinic acid from a succinate salt that involves minimal use of additional reagents, and produces virtually no waste by-products, and permits internal recycle of the base and acid values, is provided. The method involves the formation of diammonium succinate, either by using an ammonium ion based material to maintain neutral 8 pH in the fermenter or by substituting the ammonium cation for the cation of the succinate salt created in the fermenter. The diammonium succinate can then be reacted with a sulfate ion, such as by combining the diammonium succinate with ammonium bisulfate and/or sulfuric acid at sufficiently low pH to yield succinic acid and ammonium sulfate. The ammonium sulfate is advantageously cracked thermally into ammonia and ammonium bisulfate. The succinic acid can be purified with a methanol dissolution step. Various filtration, reflux and reutilization steps can also be employed.
IPC 1-7
IPC 8 full level
C12P 7/46 (2006.01)
IPC 8 main group level
C12P (2006.01)
CPC (source: EP US)
C12P 7/46 (2013.01 - EP US); Y10S 435/822 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9909196 A1 19990225; AR 017255 A1 20010905; AT E260343 T1 20040315; AU 9107598 A 19990308; BR 9815652 A 20010828; CA 2301177 A1 19990225; CA 2301177 C 20080129; DE 69821951 D1 20040401; DE 69821951 T2 20041216; EP 1005562 A1 20000607; EP 1005562 A4 20020522; EP 1005562 B1 20040225; IN 190421 B 20030726; JP 2001514900 A 20010918; JP 4242558 B2 20090325; US 5958744 A 19990928; US 6265190 B1 20010724; ZA 987428 B 19990518
DOCDB simple family (application)
US 9817123 W 19980818; AR P980104067 A 19980818; AT 98943239 T 19980818; AU 9107598 A 19980818; BR 9815652 A 19980818; CA 2301177 A 19980818; DE 69821951 T 19980818; EP 98943239 A 19980818; IN 521BO1998 A 19980817; JP 2000509858 A 19980818; US 13406198 A 19980813; US 38964199 A 19990902; ZA 987428 A 19980818